Brand new, never used Bluetooth speaker outdoor with loud volume: Even outdoors, benefit from Muzen's latest sound production and processing audio tech, and do not worry about sound distortion and low volume. Portable Mini Bluetooth speaker: Pocket easily, Mini size design build the small player, retro the small Bluetooth speaker only takes a space like almost jeans pocket(Please check product details for specific size) Bluetooth, FM radio, and AUX Functionality - Product Dimensions: 3.46 * 2.56 * 2.2 in - Speaker: 40mm / 1.57 in neodymium iron boron, full frequency - Battery: Rechargeable lithium polymer battery (3.7V/1000mA) - Net Weight: 0.94 lb - Battery Life: 8-10 hours - Frequency Range: 87-108 MHz - SNR: > 60db - Distortion: ≤ 0.5%- Bluetooth Version: 4.0 - Bluetooth Frequency Range: 5m≤distance≤10m / 16.4ft≤ distance≤ 32.8ft - Bluetooth Connection Distance: 2402 MHz to 2480 MHz